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Relief organizations have a mission close to home: improving their own efficiency and accountability.

Note: INSEAD used to offer free evaluation copies of their cases. They no longer do...

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As the big three Internet portals - AOL-Time Warner, Microsoft/MSN, and Yahoo! continue to grow thanks to early market domination, smaller and younger portals like Terra Lycos are fighting for their piece of the action. But is there enough to go around? With Internet advertising on the slide, Terra Lycos must look for new areas of growth, and perhaps even change its business model. In this Case Study, Professor Theodoros Evgeniou looks at the economics of portals, and specifically, Terra Lycos' search for new revenue streams.

Over the past century, Rolex has built and defended a strong position in the high-end watch market. And it has remained independent even as many competitors have sought the shelter of conglomerates. Today, Rolex is the largest single luxury watch brand, with revenues of about $3 billion and annual production of between 650,000 and 800,000 watches. The secret to its success: a strategy that eschewed fashion and emphasized performance, brand purity, and continuity.

"Minerals should - and can - be extracted, processed and used in ways that are environmentally responsible." Those words, coming from Michael J. Kowalski, chairman and CEO of Tiffany & Co., set the stage for a discussion last week of the luxury jeweler and specialty retailer's recent efforts to bring about industry reform. Kowalski spoke to a Wharton marketing class that looked at such issues as how Tiffany should proceed in its campaign to promote responsible mining, what the campaign might do to its brand equity, and how the public commitment to reform could affect consumers and shareholders.

His goal: To single-handedly save the world's women from obesity. With Curves, he seems to be pulling it off. And he's built a billion-dollar business along the way.